我正在用intellij制作一个uml类图，上面写着“sketch it！”插件，但它说在第5行有一个语法错误，它第一次说的是名称空间。我不明白为什么，因为它说同样的多次以及下面没有一个错误。我在网上找不到这个程序的教程，所以我很难修复它。

@startuml

title __STREAMINGSERVICE's Class Diagram__\n

  namespace  {    \\   <--- this is where I get the syntax error!!
    class ChangeLoginGUI {
    }
  }

  namespace  {
    class Episode {
    }
  }

  namespace  {
    class EpisodeGUI {
    }
  }

  namespace  {
    class FileReader {
    }
  }

  namespace  {
    class IncorrectLoginException {
    }
  }

  namespace  {
    class InfoGUI {
    }
  }

  namespace  {
    class InfoSGUI {
    }
  }

  namespace  {
    abstract class InfoSuper {
    }
  }

  namespace  {
    class LoginGUI {
    }
  }

  namespace  {
    class Main {
    }
  }

  namespace  {
    class MainGUI {
    }
  }

  namespace  {
    abstract class Media {
    }
  }

  namespace  {
    class MediaLibrary {
    }
  }

  namespace  {
    class MediaPlayer {
    }
  }

  namespace  {
    class Movie {
    }
  }

  namespace  {
    class MovieGenerator {
    }
  }

  namespace  {
    class MovieGeneratorTest {
    }
  }

  namespace  {
    class NotificationGUI {
    }
  }

  namespace  {
    abstract class ObjectGenerator {
    }
  }

  namespace  {
    interface Playable {
    }
  }

  namespace  {
    class SearchEngine {
    }
  }

  namespace  {
    class SearchEngineTest {
    }
  }

  namespace  {
    class Series {
    }
  }

  namespace  {
    class SeriesGenerator {
    }
  }

  namespace  {
    class SeriesGeneratorTest {
    }
  }

  namespace  {
    class User {
    }
  }

  namespace  {
    class UserList {
    }
  }

  ChangeLoginGUI -up-|> javax.swing.JFrame
  ChangeLoginGUI o-- User : user
  ChangeLoginGUI o-- UserList : userList
  Episode .up.|> Playable
  EpisodeGUI -up-|> javax.swing.JFrame
  EpisodeGUI o-- MediaPlayer : play
  EpisodeGUI o-- Series : media
  EpisodeGUI o-- MediaLibrary : ml
  EpisodeGUI o-- User : user
  InfoGUI -up-|> InfoSuper
  InfoSGUI -up-|> InfoSuper
  InfoSuper -up-|> javax.swing.JFrame
  InfoSuper o-- Media : media
  InfoSuper o-- MediaPlayer : play
  InfoSuper o-- User : user
  LoginGUI -up-|> javax.swing.JFrame
  LoginGUI o-- MainGUI : launchProgram
  LoginGUI o-- UserList : userList
  MainGUI -up-|> javax.swing.JFrame
  MainGUI o-- MediaLibrary : mediaLibrary
  MainGUI o-- SearchEngine : searchEngine
  MainGUI o-- User : user
  MediaLibrary o-- SeriesGenerator : m1
  MediaLibrary o-- MovieGenerator : m2
  MediaPlayer -up-|> javax.swing.JFrame
  Movie .up.|> Playable
  Movie -up-|> Media
  MovieGenerator -up-|> ObjectGenerator
  MovieGeneratorTest o-- FileReader : fr
  MovieGeneratorTest o-- MovieGenerator : mg
  MovieGeneratorTest o-- MovieGeneratorTest : mgt
  ObjectGenerator o-- FileReader : fr
  SearchEngine o-- MediaLibrary : mediaLibrary
  SearchEngineTest o-- SearchEngine : searchEngine
  Series -up-|> Media
  SeriesGenerator -up-|> ObjectGenerator
  SeriesGeneratorTest o-- FileReader : fr
  SeriesGeneratorTest o-- SeriesGenerator : sg

right footer

PlantUML diagram generated by SketchIt! (https://bitbucket.org/pmesmeur/sketch.it)
For more information about this tool, please contact philippe.mesmeur@gmail.com
endfooter

@enduml